Winding machines



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www@ United States Patent O WINDIN G MACHINES Robert A. Goodall, Ogallala, Nebr., assignor, by mesne assignments, of one-half to Clarice M. Goodall, Ogallala, Netix., as executrix of said Robert A. Goodall, deceased, and one-half to Clarice M. Goodall, individually Application April 23, 1953, Serial No. 350,589

Claims. (Cl. 24H-M561) This invention relates to Winding machines and has to do more particularly with a machine for winding strip material to form a roll. The invention is especially well adapted for winding together strips of metal foil and insulating material to form electrical capacitors.

Electrical capacitors formed by winding together two or more strips of metal foil and interposed strips of insulating material heretofore have been formed by operations which have included principally manual operations. Such operations are time consuming and expensive and it is diiicult to maintain the desired degree of accuracy and uniformity in forming capacitors.

An object of the present invention is to provide a novel fully automatic machine for winding elongated strip material to form a roll.

Another object is to provide a fully automatic machine for Winding strips of metal foil and interposed strips of insulating material together into a roll to form electrical capacitors.

Another object is to provide a fully automatic machine for winding strip material to form a roll in which the strip material is wound under predetermined, closely controlled tension.

Another object is to provide a machine for winding strip material to form a roll wherein the strip material is maintained under positive control at all times and there are no free ends of any substantial length which might become unmanageable by reason of the static developed in the movement of the material.

Another object is to provide a machine for winding strip material to form a roll wherein a novel mandrel is provided for receiving and positively gripping the material to be Wound, in such manner as to insure against tearing or wrinkling of the material.

Another object is to provide a machine for winding strip material to form a roll wherein a novel mandrel is provided whereby the mandrel may be Withdrawn from the wound roll without disarranging the turns of the roll.

Other objects of the invention are to provide a machine for winding strip material and having a novel mechanism for severing the strip material at the conclusion of the winding operation; a novel mechanism for rotating the mandrel to Wind the strip material thereon to form a roll; novel means for almost instantaneously halting the mechanism for rotating the mandrel; novel means for guiding the strip to the winding material; novel means for adhesively securing the terminal end of the rolled strip material to prevent unwinding of the roll after it has been removed from the machine; a novel mechanism for periodically rotating through a predetermined angle a winding head carrying a mandrel; novel means for almost instantaneously halting the driving mechanism which rotates the winding head.

Other objects and advantages of the invention will appear from the following description taken in connection with the appended drawings in which:

Figure 1 is a front elevational view of a machine constructed in accordance With the invention;

Fig. 2 is a horizontal sectional view taken approximately alonge line 2--2 of Fig. 1;

Fig. 3 is an enlarged, fragmentary cross-sectional View taken along line 3-3 of Fig. 2;

Fig. 4 is an enlarged, fragmentary, cross-sectional view taken along line 4-4 of Fig. 6;

Fig. 5 is an enlarged, fragmentary, cross-sectional view taken along line 5--5 of Fig. 6;

Fig. 6 is a fragmentary top view of the winding head and certain associated members;

Fig. 7 is a front elevational view of the mechanism of Fig. 6;

Fig. 8 is a cross-sectional view taken along line 8-8 of Fig. 6;

Fig. 9 is an enlarged fragmentary, perspective view of a portion of the Winding head;

Fig. 10 is an enlarged, fragmentary, sectional view taken along line 10-10 of Fig. 9;

Fig. l1 is an enlarged, fragmentary, sectional View taken along line 11--11 of Fig. 6;

Fig. l2 is an enlarged, fragmentary, sectional View taken along line l212 of Fig. 6;

Fig. 12a is a sectional view taken along line 12a-42a of Fig. 12;

Fig. 12b is an enlarged, fragmentary view of the mandrels;

Fig. 13 is an enlarged sectional view taken along line 13-13 of'Fig. 6;

Fig. 14 is an enlarged sectional view taken along line lid-14 of Fig. 6;

Fig. 15 is an enlarged fragmentary View, partially in cross section, of a portion of the mandrel shaft rotating mechanism;

Fig. 16 is a View of a section taken along line 16-16 of Fig. `l5;

Fig. 17 is an enlarged fragmentary, cross-sectional view taken along line 174W of Fig. 2; i

Fig. 18 is an enlarged fragmentary, perspective view of,

the offset and cutter mechanism;

Fig. 19 is an enlarged fragmentary, cross-sectional view taken along line l9-19 of Fig. 2;

Fig. 20 is an enlarged fragmentary, perspective View of the winding head stop mechanism;

Fig. 21 is an enlarged fragmentary, cross-sectional view taken along line 2li-21 of Fig. 3;

Fig. 22 is an enlarged fragmentary View, partially in cross section, of a portion of the cam controller drive;

Fig. 23 is an enlarged fragmentary view, partially in cross section, or" one of the cylinders;

Fig. 24 is a slightly enlarged, fragmentary cross-sectional view taken along line 242fl of Fig. 2;

Fig. 25 is an enlarged, perspective view of the gluing mechanism;

Fig. 261s a slightly enlarged, fragmentary cross-sectional view taken along line 26-26 of Fig. 25;

Fig. 27 is a cross-sectional View taken along line 27-27 of Fig. 25;

Fig. 28 is an enlarged fragmentary, front elevational view of a portion of the hold-down mechanism;

Fig. 29 is an enlarged sectional View taken along line 29-29 of Fig. l; h

Fig. 30 is an enlarged sectional view taken along line .3Q-30 of Fig. 29;

Fig. 31 is an exploded, perspective view of the controller cam of Fig. 30;

Fig. 32 is a timing chart indicating the timing provided by the cam controller;

Fig. 33 is a wiring diagram of the cam motor circuit;

Fig. 34 is a Wiring diagram of the mandrel rotating motor circuit;

Fig. 35 is a wiring diagram of the winding head motor circuit;

Fig. 36 is a diagrammatic View illustrating the position of certain of the winding elements in one position which they take during the winding operation;

Fig. 37 is a View similar to Fig. 36 showing the elements in another position;

Fig. 38 is a View similar to Fig. 36 showing the elements in still another position;

Fig. 39 is a View similar to Fig. 36 showing the elements in still another position;

Fig. 40 is a view similar to Fig. 36 showing the elements in still another position;

Fig. 41 in a fragmentary, somewhat diagramatic, view showing the arrangement of strips viewed from above, the thickness of the strips being exaggerated;

Fig. 42 is a sectional view taken along line 42-42 of Fig. 41;

Fig. 43 is an enlarged fragmentary sectional view taken along line 43-43 of Fig. 2;

Fig. 44 is a front elevational View, partially in cross section of the structure of Fig. 43; and

Fig. 45 is a fragmentary sectional view taken along line 45-45 of Fig. 44.

Referring now to Fig. l the machine includes a frame formed of a plurality of vertical and horizontal structural members, such as angle irons and straps or bars, suitably secured together, as by welding. Supported on the frame 11B@ are a plurality of horizontal panels or shelves inciuding a main shelf 11 on which a number of the principal operating parts of the machine are mounted, a lower shelf 102 on which a portion of the control mechanism is mounted, an intermediate shelf 103 for holding a collecting receptacle (not shown), and a wheel panel 104 is supported by the frame and extends vertically above and below the main shelf 101.

Mounted on the wheel panel 104 is a plurality of holders 1111 for rolls of metal foil F in strip form and holders 111 for rolls of insulating material P in strip form (sometimes hereinafter called paper strip). Each of the holders 111B and 111 is adapted to maintain a predetermined friction on the roll so as to permit proper tension on and feeding of the strip material to a winding head 130 which winds the strips together to form a roll. It should be explained at this point that the foil holders and paper holders may be varied in number and arrangement depending upon the desired number and arrangement of strips of foil and paper which are to be wound together. Also the arrangement for guiding the strips from the holders or what I call Stringing may also be varied. f

For the purpose of illustrating the present invention there is shown eight paper holders and two foil holders in an arrangement (see Fig. 3) whereby the strips are fed to the winding head in such manner that when the capacitor is wound there is an inner turn of foil, then four turns of paper, then an outer turn of foil, then four turns of paper. lt will be noted that in the arrangement shown two of the lower paper wheels 111 serve to guide the strips of paper from their respective wheels 111 toward the winding head 13G.

A plurality of suitably curved paper guides 113 are secured to the wheel panel 164 in appropriate positions as by screws 113m extending through tubular portions 113e, secured to the guides as by welding. The screws 113@ extend through slots 11M-a in the panel 1114 whereby the positions of the guides 113 may be adjusted. rThe guides 113 are suitably shaped so as to guide the strips of foil F and paper P respectively into proper feeding relation to the winding head 131i. The paper guides 113 are formed preferably of sheet material and extend out wardly from the wheel panel 1114 a sufficient distance laterally to accommodate the widths of the strips P and F. The guides 113 are of such length as to apply sufficient friction to the strips to maintain tension on the strips, which tension is independent of the diameter of the roll of strip material. In order to aid the guides 113 in guidwheel 117 and washer i spring 12S at intervals.

ing the strips, one or more rollers 114 are provided which extend outwardly from the wheel panel 104 in a manner analogous to the guide 113. The rollers 114 are employed at locations where the strips P and F converge and where the paper guides of strip form, such as the guides 113, might interfere with the passage of the strips, and are so located as to divided the strips P and F into three groups, as shown in Fig. 3.

The machine of the present invention is constructed and preferably is employed to wind two capacitors or like devices simultaneously. To this end a plurality of foil and paper holders and guides such as just described is mounted on each face of the wheel panel 104 as will be seen from Fig. 1.

The toil and paper holders and 111 preferably are similar in construction except that the mounting wheel for the roll of foil may be somewhatsmaller in diameter than the mounting wheel for the paper, inasmuch as the roll of foil is smaller in diameter than the roll of paper.

One such holder is shown in detail in Fig. 21 to which reference is now made. The holder 111 includes a hollow spindle or hub 115 which is secured in the wheel panel 1114- as by a non-slip press lit, to which end the central portion of the hub preferably is knurled, and projects equally from each face of the panel 104. A tube 116 which serves as a bearing and spring guide is fitted over the projecting portion of the hub and is pressed into a wheel 117 having a hub portion 118 which carries a roll of paper P (or a roll of foil F as the `case may be). A retainer flange 119 is journaled on the tube 116 and is adapted to bear against the end wall of the hub 118 and the side of the roll 1 to retain the latter on the wheel 117. The hub 11S is formed with a cavity 120 which receives a washer 121 mounted on the tube 116 and bearing against the bottom wall of the cavity 120.

The wheel 117 is adjustably positioned on the hub 11S by a mechanism which permits accurate adjustment of the wheel and consequently accurate positioning of the roll P in a lateral direction relatively to the winding head 13h, which is important to the accurate winding of the capacitor as will appear hereinafter. The adjusting mechanism includes `a wheel stop 122 which extends through aligned longitudinally extending slots 123 formed in the hub 115 and projects therefrom across the end of the tube 116 and a portion of the washer 121. The wheel stop 122 is threaded substantially throughout its length and is screwed through an adjusting screw 124 which extends into the hub 115 and is positioned therein by a thumb nut 125.

A collar 126 is adjustably secured in position on the hub 115 by a thumb screw 127. A coil spring 128 seats at one end against the collar 126 and bears at the other end against the flange 119, to urge the latter and the 121 toward the wheel stop 122. The spring 128 exerts a uniform, predetermined pressure on the iiange 119 and thus a predetermined uniform friction is exerted on the wheel 117 which may be made sucient to maintain the paper taut between the roll P and the winding head 130. This friction may be adjusted by adjusting the position of the collar 126.

As the strip is withdrawn from the wheel, the tension on the strip becomes less. Accordingly, during operation, it is desirable to adjust the drag exerted by the As pointed out above, tension on the strips also is provided by the long guides 113.

The winding head (Figs. l and 2) is mounted on the main shelf 1111 for intermittent rotational movements successively through 18() degrees about its longitudinal axis. The winding head 13) (see Figs. 6 and 7 includes a front head plate 131, a middle head plate 132 of similar form, and a rear head plate 133, all spaced apart longitudinally and connected together by a pair of o, spaced tie plates 134, 134, thus forming a rigid frame* like structure which serves to carry the remaining members of the winding head 130.

A head bearing member 136 of circular shape is secured to the outer face of the front head plate 131 and is journaled in a circular head bearing 137 supported on the main shelf 101 by a bearing support 138 of suitable construction and which preferably includes uprights 139 (Fig. 8) and a brace 140. A second bearing 141 for the winding head is provided by a sleeve 142 carried by a bracket 143 secured to the `shelf 101, which sleeve journals the winding shaft 150.

If desired a bearing (not shown) may be provided in addition to or in lieu of the bearing 136. Such bearing is located to the right of the head 136 (as viewed in Fig. 1) beyond the mandrel guides hereinafter described.

The winding head 130 is rotated by a head drive shaft which is journaled at one end (left-hand end as viewed in Fig. 2) by a bearing 151 secured on the main :shelf 101. The head drive shaft 150 extends through and is secured in the rear head plate 133 as by a set screw 152 (Fig. 14). The head drive shaft 150 at its other lend (right-hand end) is formed with a socket 153 (Fig. 5) in which is located a sleeve bearing 154 into which is pressed one end of a winding drive shaft 155, the function of which is explained hereinafter.

A mandrel guide shaft 160 (Fig. 6) of hollow form extends through the front and middle head plates 131 and 132 and is secured in the head bearing plate 136 by a set screw 161 (see Fig. 9). The mandrel guide shaft 160 projects beyond the front head plate and receives and aids in supporting the winding drive shaft which is supported at its right-hand end (as viewed in Fig. 6) in a manner hereinafter described. The mandrel guide shaft also serves to rotatably support a pair of inner and outer spaced mandrel guides 162e and 162b (Fig. 9), which are rigidly secured on the mandrel guide shaft. Each of the mandrel guides is of generally disc shape and has adjacent the periphery and in diametrically opposed positions, a mandrel guide bearing 163 having a mandrel guide opening 164 extending therethrough and which is flared at its outer end to facilitate the entry of the mandrel (hereinafter described) therein. A pair of guide bearings 16S, 165 are secured in the head bearing plate 136, which are generally similar to the bearing 163 except that they have larger faces and the bore is countersunk at the inner end instead of the outer end. The guide bearings 163 on the guides 162e and 16212 respectively are aligned and are in alignment with the guide bearings 165.

Secured in and extending between the front and middle head plates are a. pair of tubular spacers 169 (Fig. 6) which serve as guides for the mandrel carrying members now to be described. Each spacer 169 is provided with a slot 169:1 which permits access to the mandrel therein and removal of any strip material which may have been accidentally carried into the spacer upon retraction of the mandrel. Each mandrel 170 (see Figs. l2 and 36) is formed by two separate semicircular segments or mandrel halves 171, 172 which are adapted to be shifted relatively in a longitudinal direction independently whereby there may be projected separately into an active position wherein they extend through the mandrel guides 162e, i621), and a retracted position wherein they are retracted out of the latter. The mandrel segments 171, 172 are complementally tapered along their fiat surfaces, seen in Fig. 12b for a purpose which will appear hereinafter. The bottom mandrel segment 171 is carried by a mandrel shaft 173 which is provided with a relatively deep slot 174 throughout its length. The bottom mandrel segment 171 is secured in the bottom of the slot 174 by suitable means such as silver solder and projects beyond the end of the shaft 173 a distance suf* 6 cient to permit the bottom mandrel segment 171 to be projected through the front `head plate 131, the head bearing plate .136 and the mandrel guides 162:1, 162b upon suitable actuation of the mandrel shaft 173. The top mandrel segment 172 is suitably secured as by silver solder to a mandrel arm 175 which is slidably disposed in the slot 174 of the mandrel shaft 173. The mandrel shaft 173 is slidably guided in the corresponding spacer 169 and is rotatable therein.

Slidable in the rear head plate 133 is a mandrel tube ld (Fig. ll) which receives the left-hand end (as viewed in Fig. l1) of the mandrel shaft 173 and is provided with a h ole 181 into which a lug 132 on the lefthand end of the mandrel arm 175 is inserted. Thus the mandrel arm 175 moves longitudinally with the mandrel tube 13d as the latter is moved in a longitudinal direc tion relatively to the winding head frame. Since the mandrel shaft 173 is slidable relatively to the mandrel tube 180, it also is slidable relative to the mandrel arm 175.

Two limit positions for the movement of the mandrel tube relatively to the rear head plate 133 are determined respectively by two detents formed by a pair of spaced circumferential grooves 182, 183 in the mandrel tube 134) adapted to receive therein a ball 184 which is slidable in a bore 185 in the rear head plate 133 and urged outwardly by a spring 186 seated against a screw plug 187.

A stop sleeve 188 also may be provided which is freely slidable on the mandrel tube 180 and is adapted to cooperate with a stop collar 189 rigidly secured on the inner. end of the mandrel tube 180 to limit outward movement of the mandrel tube relatively to the rear head plate 133.

The mandrel tube 180 carries at its outer (left-hand) movable in a longitudinal direction in order to permitV the strips to be engaged therebetween prior to the rotation of the mandrel to wind the strip. The lower seg* ment 171 is projected into winding position, then the strips are carried across the lower segment, whereafter the upper segment is projected into winding position. The segments are so dimensioned and positioned that when they both are projected into position, they grip the strips between them, this action being accomplished by the aid of the mandrel guides. As above stated the mandrel segments are complementally tapered along their flat surfaces, which permits the upper mandrel segment to be withdrawn from the finished roll without disarranging the inner turns of material, leaving the roll on the lower mandrel segment until it is Withdrawn.

The mandrel shaft 173 is moved longitudinally by a mechanism including a collar 191 rigidly secured on the mandrel shaft 173 and rotatable therewith. The collar 191 is formed with a groove 192 which receives .the bifurcate end of a wrapper finger 193 (Figs. 4 and 6) which is secured to the end of a guide rod 194 slidable in a tubular guide 195 secured in the front and middle head plates 131 and 132. The wrapper finger 193 is movable longitudinally by means hereinafter described to project or retract the mandrel shaft 173 and bottom mandrel segment 171. Where the machine is to be used to wind larger capacitors, the Wrapper -bar 196 is removed and the guide rod 194 is replaced by a wrapper bar (not shown) of such length as to project from the guide 195 and past the guides 162e and 162b, thus locating the wrapper bar (not shown) at a greater radius from the axis of the winding head.

The wrapper finger 193 also is secured to one end of wrapper bar 196 which projects through aligned openings 7 in the front and middle head plates 131 and 132 and the head bearing plate 136, and is adapted to be projected into position beyond the outer mandrel guide 1621i to aid in the winding operation.

The two mandrels 170 are adapted to be rotated by rotation of the winding drive shaft 155. To this end a driving gear 200 (Figs. and 6) is nonrotatably secured to the winding drive shaft 155 as by a set screw 201 and meshes with drive gears 202 nonrotatably mounted on the mandrel shafts 173 respectively. Each of the latter gears 202 (Fig. 12) is provided with a hub having diametrically opposed slots 204 and is slidably but nonrotatably carried thereon by a gear clip 2G15. The gear clip 205 is of generally split ring form and has one end turned in to form an ear 206 which end extends radially inwardly. The gear clip 205 is carried on the hub and has the ear 206 extending through one cf the slots 204 and into the slot 174 in the mandrel shaft 173. gears 202 thus are slidable relatively to their respective mandrel shafts 173 but upon rotation serve to rotate the shafts. The gears 202 are retained in longitudinally fixed position relatively to the adjacent middle plate 132 so that upon longitudinal movement of either of the mandrel shafts 17.3 the corresponding gear is not displaced longitudinally out of meshing engagement with the gear u. To this end a gear retainer 210 is disposed in position receiving the end of the winding drive shaft and is held by a screw 211 threaded into one of the tie plates 134. The gear retainer 210 is of such size and is so positioned that it extends across the outer end faces of the gears 202 and prevents them from being displaced outwardly away from the adjacent middle head plate 132. The gears 202 are restrained against inward movement by the middle head plate 132.

From the foregoing it will be seen that when the winding drive shaft 155 is rotated it rotates the gear 200 which drives the gears 202 to rotate the corresponding mandrel shafts 173. Because of the arrangement of gears both of the mandrel shafts are rotated in the same direction. Moreover, since the gear 200 and the gears 202 have the same number of teeth, the planetary action is such that the two mandrel shafts 173 are similarly positioned in each of the two positions of the winding head 130. Thus, the mandrely segments 171 and 172 are in the same relative positions, that is top and botom, in either of the two positions of the winding head.

The winding head 130 is generally symmetrical about a longitudinal medial plane and there are two similar mandrels and associated elements. For convenience in describing the mandrel head 130 and its operation the mandrel 170 which is at the forward portion of the winding head, when the latter is in either of its two stop positions, is referred to as the forward mandrel and the other mandrel is referred to as the rearward mandrel. The elements associated with each of the mandrels, 170 respectively lare correspondingly designated as forward and rearward elements. lt will be understood that such designations refer only to tbe positions of the mandrels and other elements when the winding head is in either of its two positions referred to, and that upon rotation of the winding head through degrees the positions of the mandrels and other elements arev reversed.

The mandrels 170 are projected and retracted by four air-driven mechanisms 1, 2, 3 and 4 (Fig. 2) (hereinafter sometimes referred to as cylinders), and certain other elements of the machine, as elsewhere herein explained, are actuated by generally similar cylnders 5, (t, 7, S and 9. One of the cylinders is described now in order to facilitate an understanding of the actuation of the mandrels 170 thereby.

All of the several cylinders are substantially similar in construction and operation, and therefore only one suchcylinder will be described in detail. However, it will be understood that the several cylinders may vary in dimensions in view of their differing load and travel requirements. Also the cylinders vary as indicated elsewhere herein in respect to the driving elements which areconnected thereto in order to adapt the cylinders for the several different uses to which they are applied.

Referring now particularly to Fig. 23 the cylinder in cludes a cylinder proper 215 having an inlet cap 216I threaded to one end and serving to attach to that end of the cylinder 215 a connector 217 for connecting an air inlet pipe 218 to the cylinder. A bearing cap 219 is` threaded to the other end of the cylinder 215 and serves to close that end of the cylinder except for an opening (not shown) in the bearing cap in which a pisten rod 22@ is slidable. At its inner end the piston rod 220 carries a piston-like air sealing element or piston 221 formed of suitable flexible sealing material such as leather, and a spring 222 is compressed between the piston 221 and the bearing cap 219 to normally urge the piston rod 229 toward the inlet end of the cylinder.

The end of the piston rod 220 which projects from the bearing cap, serves to carry a suitable actuating element which as above indicated, is so formed as to suitably perform duties to be required of the cylinder.

The cylinder 1 (Fig. 2) is adapted to project the lower serment 171 of the rearward mandrel 170, and to that end is provided with a pusher head 230 carried by the piston rod and disposed in alignment with the rearward wrapper iinger 1% which actuates the rearward mandrel shaft 173. When the cylinder 1 is energized its piston rod is projected and causes the pusher head 230 to engage and move to the right (as viewed in Fig. 2) the rearward wrapper finger 193 and thereby project the rear lower mandrel segment 171.

rEhe cylinder 2 is adapted to project the rearward upper segment 172 of the rearward mandrel 170 and therefore is formed with a pusher head 231 similar to the pusher head 230 of the cylinder 1, and is disposed in alinement with the collar on the rear mandrel tube 180. Energization of the cylinder 2 causes its piston rod to ,be projected and move the pusher head 231 into abutment with the collar 19d and move the same to the right (as viewed in Fig. 2) and thus project the rearward upper mandrel segment 172.

The cylinder 3 is provided for the purpose of retracting the forward upper segment 172 of the forward mandrel 170. The cylinder 3 therefore is disposed parallel to the direction of movement of the forward mandrel 170 but is offset slightly therefrom. The cylinder 3 is provided with a linger rod 232 attached as by a connector 233 to the projecting end of the piston rod and carrying at its free end a iinger 234 adapted to engage the inner face of the collar 190 on the forward mandrel tube 15:30. The finger rod 232 slides in a guide 235 fixed relatively to the cylinder. The arrangement is such that when the cylinder 3 is energized its piston rod is moved to the left (as viewed in Fig. 2) causing the linger 234 to engage the collar 190 and move the forward mandrel tube 180 to the left, thus retracting the upper mandrel segment of the forward mandrel.

A delay release mechanism 240 (Figs. l and 19) is provided which includes a delay release pin 241 which is movable between a projected and retracted position and which in its projected position serves as a stop to prevent the outward movement of the forward wrapper bar finger 193 and consequent retraction of the forward mandrel shaft 173. The delay release pin 241 is slidably mounted for vertical movement in a guide tube 242 secured in the main shelf 101. The delay release pin 2411 is normally urged toward projected (upper) position by a spring 243 secured at one end to a fixed anchor screw 24fland at the other end to a screw 245 which serves to connect the delay release pin 242 to a core or plunger 246 of a solenoid 2li-7 secured below the main shelf 101. The delay release pin 241 thus is normally urged into projected position and serves as a stop to present the forward wrapper. bar finger 193 from being retracted. However, upon energization of the solenoid 247 in the manner elsewhere herein explained, the delay release pin 241 is retracted to permit the forward wrapper bar finger 193 to be moved to its retracted position.

The cylinder 3 is adapted to actuate a microswitch 250 (Fig. 2) which controls the energization of the delay release solenoid 247. The microswitch 250 is normally open and secured on the main shelf 101 in the path of movement of the piston rod of the cylinder 3. When the cylinder 3 is energized its piston rod engages and closes the microswitch 250 to thereby energize the delay release solenoid 247, which retracts the delay release pin 241 to permit retraction of the forward wrapper finger 193 and the connected wrapper bar 196 and lower mandrel segment 171. The electrical. connections to effect this result are described hereinafter. A stop 1250 is associated with the microswitch 250 and piston rod of the cylinder 3.

The cylinder 4 is provided for the purpose of retracting the lower segment 171 of the forward mandrel 170 and is generally similar in construction to the cylinder 3. The cylinder 4 has a finger 251 adapted to engage the inner face of the forward wrapper nger 193. When the cylinder 4 is energized it moves its piston rod to the left and causes its linger 251 to move the wrapper linger 193 and connected members to the left (as viewed in Fig. 2) to retract thelower segment of the forward mandrel 170.v

The cylinder 4 is adapted to actuate a normally open microswitch 252 (Fig. 2) which controls the operation of a head Stop mechanism 253 hereinafter described, the function of which is to hold the winding head 130 in either of its two positions for the winding operation as hereinafter explained. The microswitch 252 is secured on the main shelf 101 in the path of movement of the piston of the cylinder 4, whereby upon energization of that cylinder the microswitch is closed. The `microswitch 252 is electrically connected to the head stop mechanism 253 by a circuit which is described hereinafter. A stop 1252 is associated with the piston of the cylinder 4.

The winding drive shaft 155 is driven at periodic intervals to rotate the shaft a predetermined number of rotations during each period `of actuation so as to rotate the mandrels and Wind on to the rearward mandrel a predetermined number of turns of foil and paper, after which the winding drive shaft 155 is halted and the winding head 130 rotated through 180 degrees to reverse the positions of the mandrels and to bring the other mandrel into position for winding.

The drive mechanism for the winding drive shaft 155 includes a winding motor 260 (Figs. 2 and l5) secured on the main shelf 101 and connected through a drive now to be described to the winding drive shaft 155. A drive pulley 261 is rigidly secured on the motor shaft 262 and is connected by a belt 263 to a driven pulley 264 which floats on a drive shaft 265 connected rigidly by driving connection 266 to one end of the winding drive shaft 155. The drive shaft 265 is journaled in spaced bearings 267 and 268 rigidly supported on the main shelf 101. One of the bearings 268 also serves to journal the adjacent end of the mandrel guide shaft 160, and supports the winding drive shaft 155 carried therein.

The driven pulley 264 is normally urged into friction driving engagement with a clutch plate 270 by a coil spring 271 bearing against a collar 272 secured to the driving shaft 265. A sprocket 273 is secured to the driving shaft 265 and is connected by a chain 274 to a sprocket 275 (Fig. 16) which floats on the motor shaft 262. The sprocket 275 carries four pins or abutment members 276 which are circumferentially spaced about the axis of the sprocket and project therefrom in a direction parallel to the axis. Four pins are provided because the sprocket 275 has four times as many teeth as the 10 sprocket 273. These pins are so spaced that on any' revolution of he mandrels they will be stopped in the correct position for operatic-ns of moving the mandrels in or out.

A stop mechanism 280 (Figs. l5 and 16) is provided for halting the rotation of the sprocket 275 after a predetermined number of revolutions of the winding drive shaft 265. The stop mechanism includes a pin or abutment member 281 slidable in a guide into and out of the path of movement of the several pins 276 carried by the sprocket 275. The Stop pin 281 is normally urged outwardly into projected position by a pair of coil springs 282 secured at one end to a guide bracket 283 and at the other end to a screw 284 secured to the pin 281 which connects the stop pin to a core or plunger 285 of a solenoid 286. The solenoid 286, when energized, draws the stop pin 281 into retracted position out of the path of movement of the pins 276. Means are provided for preventing reverse movement of the sprocket 275 after one of the pins 276 carried thereby strikes the stop pin 281. Such means includes a stop 290 formed of resilient sheet metal and supported at one end on a mount 291 so that the free end of the stop 290 is bent into the path of movement of the pins 276 carried by the sprocket 275, but is pushed out of the way by the pins 276 as they rotate. In other words, the stop acts in the manner of a dog and permits the sprocket 275 to rotate in one direction without interference but engages the nearest pin 276 when the sprocket 275 is halted by the stop pin 281, to thereby prevent reverse movement of the sprocket. This is necessary since the rotation of the head reverses the tension on the sprocket chain 274 and at the end of the head rotation, the pin 276 wiil be restrained by stop 290. A stop guide or damper 292 is provided for limiting vibration of the stop 290 and includes a straplike member of spring material and having a head 293 formed of resilient material such as rubber. This also prevents the stop 290 from bending out of the path of the pins 276 when the head 130 is rotated. rThe stop guide 292 is secured at one end suitably as by attaching it to a mount 294 which serves to support the solenoid 286 with the other and free end bearing against the stop 290 at a point inwardly from the free end, and out of the path of movement of the pins 276.

The drive chain 274 is trained around a sprocket 300 carried on a shaft 301 of a counter 302 whereby the revolutions of the drive shaft 265 are counted. The counter 302 as elsewhere explained operates after a predetermined number of revolutions of its shaft to deenergize the winding motor 260, and at the same time to deenergize the solenoid 286, which permits the stop pin 281 to be projected. The motor, due to its inertia, as well as the inertia of the members connected positively thereto, does not halt instantaneously and therefore the pulley 261 carried on the motor shaft 262 and the pulley 264 connected thereto by the belt 263 continue to rotate. However, the stop pin being projected into the path of the pins 276 halts the sprocket 275 at the moment that the nearest oncoming pin 276 strikes the stop pin 281. Since the sprocket 275 is positively connected to the sprocket 273 by the chain 274, the drive shaft 265 and the mandrel winding shaft are immediately halted; also the counter shaft 301 is likewise immediately halted. Since the clutch plate 270 is in friction engagement with the sprocket 264 the latter is not halted abruptly but is gradually halted as is the motor 260.

The counter 302 preferably embodies a productimeter 303 of known construction such as that manufactured by Durant Manufacturing Company, Milwaukee, Wisconsin, and designated as Durant No. 3R7QRS-CL. Since the construction *of the productimeter is well known the details are not shown or described except as is necessary to an understanding of the cooperation with the mechanism which is actuated by the productimeter. The productimeter 303 is arranged to actuate a two-way microswitch 304. The microswitch 304 (Figs. 33 and 34) 

